and it's a sign of mandala's importance as a world leader that mr. obama will be joined by former presidents george w. bush and bill clinton and their wives. anthony, venita? >> bill plante at the white house this morning. >>> the world remembers nelson mandela as a fighter for justice and a great national leader. but mandala also understood the rich power of music. in tonight's 48-hour special, "nelson mandela: father of a nation" jazz legend and cbs contributor, went wibtynton marsalis shows how music became an instrument of social change in south africa. ♪ ♪ >> nelson mandela's life-long fight for freedom in south africa had a secret weapon -- music. ♪ ♪ >> one of the masters of that music, and a man who knew nelson mandela is legendary horn man, hugh masekela. we got together to remember mandala and the music that propelled a people's revolution. ♪ ♪ >> the story of nelson mandela jailed for such a long time. but what was the perception of mandala when he was in jail? were you aware of him and what he had done? >> we all knew him from